Cilium exceptional condition

Summaryinfo

A vulnerability categorized as problematic has been discovered in Cilium. Affected by this vulnerability is an unknown functionality. Such manipulation leads to exceptional condition. This vulnerability is documented as CVE-2023-41332. The attack requires being on the local network. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cilium (affected version unknown). It has been rated as problematic. Affected by this issue is an unknown functionality. The manipulation with an unknown input leads to a exceptional condition vulnerability. Using CWE to declare the problem leads to CWE-755. The product does not handle or incorrectly handles an exceptional condition. Impacted is availability. CVE summarizes:

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In Cilium clusters where Cilium's Layer 7 proxy has been disabled, creating workloads with `policy.cilium.io/proxy-visibility` annotations (in Cilium >= v1.13) or `io.cilium.proxy-visibility` annotations (in Cilium <= v1.12) causes the Cilium agent to segfault on the node to which the workload is assigned. Existing traffic on the affected node will continue to flow, but the Cilium agent on the node will not able to process changes to workloads running on the node. This will also prevent workloads from being able to start on the affected node. The denial of service will be limited to the node on which the workload is scheduled, however an attacker may be able to schedule workloads on the node of their choosing, which could lead to targeted attacks. This issue has been resolved in Cilium versions 1.14.2, 1.13.7, and 1.12.14. Users unable to upgrade can avoid this denial of service attack by enabling the Layer 7 proxy.

The weakness was released 09/27/2023 as GHSA-24m5-r6hv-ccgp. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-41332 since 08/28/2023. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Name

• Cilium

Website

• Product: https://github.com/cilium/cilium/

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